1. Then/Now You proved triangles congruent using the definition of congruence. Use the SSS Postulate to test for triangle congruence. Use the SAS Postulate to test for triangle congruence.

2. Then/Now You proved triangles congruent using SSS and SAS. Use the ASA Postulate to test for congruence. Use the AAS Theorem to test for congruence.

3. Vocabulary included angle

4. Concept 1 SSS (Side-Side-Side)

5. Concept 2 SAS (Side-Angle-Side)

6. Concept ASA (Angle-Side-Angle)

7. Concept AAS (Side-Side-Side)

8. HL (Hypotenuse-Leg) (Use with right triangles only)

9. Concept

10. Example 1 Use ASA to Prove Triangles Congruent Write a two-column proof.

11. Example 1 Use ASA to Prove Triangles Congruent 4.Alternate Interior Angles 4.  W   E Proof: StatementsReasons 1. Given 1.L is the midpoint of WE. ___ 3. Given 3. 2. Midpoint Theorem 2. 5.Vertical Angles Theorem 5.  WLR   ELD 6.ASA 6. ΔWRL  ΔEDL